1. Principal Engineer, Coastal Structures, HR Wallingford Ltd, Wallingford, UK (corresponding author: )
2. Principal Statistician, Flood Risk, HR Wallingford Ltd, Wallingford, UK
3. Research Fellow, Coastal Structures, HR Wallingford Ltd, Wallingford, UK
4. Mathematical Consultant, Smith Institute, Harwell, UK
5. Statistician, Flood Risk, HR Wallingford Ltd, Wallingford, UK
6. Chief Technical Director, Flood Risk, HR Wallingford Ltd, Wallingford, UK